Mass. state troopers are on the lookout for one Manson Brown, a 51-year-old convicted armed robber who escaped from the Old Colony Correctional Center in Bridgewater on the late afternoon of Friday, Nov. 27.

The state police have called out the Air Wing and K-9 units in addition to officers from the Department of Corrections and troopers assigned to the State Police Violent-Fugitive Apprehension Section.

Brown is described as 5-foot-8 and approximately 145 pounds. He often wears eyeglasses and is said to be "extremely physically fit." He also likes to play chess (though we're not sure why this was important to his description.)

A report on America's Most Wanted states that Brown has been indicted in a 1996 home invasion and rape in Middlesex County based on DNA evidence. Those charges, which would send Brown to a maximum security prison and negate his chance for parole in 2012, may have prompted his flight.

Brown was currently serving a 10-year sentence handed down in 2005 for armed robbery, home invasion, and weapons charges.

Investigators have followed leads in Massachusetts and other states. Anyone who sees Brown should not approach him, but immediately call 911. Anyone with information about Brown's whereabouts is urged to call state police at 508-820-2121.